Machine for sharpening beet-slicing knives.



,Nm 834,390. PATBNTED 00T. 30,1906.

A. MAGUIN.

MACHINE PoR sHARPE-'NING BBET sLIcING KNIVES.

APPLIOATIOI FILED DEO. 30. 1905.

2 SHEETS-SHEET 2,

WITNESSES:

l 4 j p ALFRED VM AGfbI-J'IIT, 0F CHARMES; FRANCELUf y A MACHINE Fon sHAnPENuG BEEr-sLlclNG 1 Nb. 334,390. y

.To ad whom concern/ ly,

'-. citizen of the Republic of France, residing at Charmes, France,fhav'e invented certain new vand useful Improvements in Machines for Sharpening` Beet-SlicingKnives, of which the followmgis aspeeification. .v

My invention relates generally to grinding-machines, andas Aherein embodied is particularly adapted for work ysuch as beveling, truing-up, and finishing the cutting edge of blades having special or odd shapesas, for example, the various forms of slicingknives employedv in cutting up sugar-beets and `similar vegetables.. 1n machines of this `class the .requisite adjustment of a reciprocating or rotating` tooll or cutter to shape, bevel, and nish a blade of any form maybe `readily effected automatically by comparatively simple mechanism; but the results obtained rare not satisfactory.v This is due -largely to the fact that the blank from which the blade is made is not of a uniform degree of hardness throughout and when acted upon by a cutter geared to be fed and driven at a uniform speed noticeable irregularities are usually produced lin the cutting edge ofthe blade `and Ythe cutters are frequently broken, &o.`

'lhe object of my invention is, therefore, to providefas an addition to the usual relative adjustment ofthe cutter 'and work along direct lines means which will enable theoperator tomanually shift the work off such lines and present the same to the cutter in accordance with the ground.` y

The accompanying drawings wills'erve to illustratea ,machinel suitable for Icarryingl i operating in substantially the same manner to roduce practically the same result.` l

n the drawings, Figure 1 isa plan view of; the machine. Fig. 2' is a front view thereof.

Fig. 3 is a side view with the lower portion'of' the frame broken away.I Fig. 4 is an fenlarged detail sectional view showingl the preferred form of flexiblev connection employed between the Work-.holdingclamp "and `the, carriage upon which it is mounted, and Flg.

5 is a detail perspectiveview showing the PATENT j `speiaea1=i m of Letters Patent. vApplication led DeoomberSO, 1905, Serial No.298|978.

r v cutting 'L Be 1t known that I,`ALFRED MAGUIN, a -thereo lpeculiarities `and re-i quireinentsdeveloped as each blade is being an .v The work holder'or vclampfmaybe y0f. any form orconstruction desired andfconsistsy .end of a slicing-knife with theedge 'Patented oet.' feo, isos. 'A

beveled throughout a portion of its length and a. rotary cutter in position .to act thereon.

Referring now to the drawings, thevmachine shown consists, essentially, of a cuttlng-tool 1 andv a'work-holding clamp 2, mounted in adjustable relation to'each other upon a bench. or table 3. Theoutting-tool" employed is preferably of the rotary, typesuch as a circularle, emery disk, or the.

like-and is removably secured lupon a shaft-f 4fbetween a fixed collar 5 and a clamp-nut 6l in the usual manner.

The disk may be of a` shape in .crosssection approximating theform of the grooves inthe cuttin edge of the blade, as shown in Fig. 5, in or er to facilitate the work of the operator and insure greater uniformity in the cut produced.

rlvhe shaft 4 is mounted in bearings 7 7 in a frame 8, which is adjustable abouty an axis 9, to permit'the cutter tovbe set at any an le desired. The frame is provided for. t 's purpose with as indle 10, turning in a fixed earing 11 an terminating beyond the bearing in a threaded extremit clamp-nuts 12, which when t1 htened up serve to hold the frameS as justed, the angle orI degree" of ad'ustment'lbein vindito receive cated by a pointer 13 t lereon, movab e overy y a fixed scale 1,4.eupon the bearing 11,.

shaft 4-isl driven fromI acounter-'shaft 15.,. through ch l eable-speed gearing` l.consistingof cone-p le s.l 16\ 16, fastupon they roia belt 17. The weigh/tof the .pulley 16at jeoting ends of t e shafts and connecte by. .9

one end of the frame isf'counterbalancedgb a:` n ball 18 at the opposite'endthereof tofena le.

the frame to be swung with greater ease and l*also to avoid y,unriecess'ary strainuponfthe clam -nuts 12,bywhichfthe frame is klheld in justedposition.

ordinarily of two jaws 19 19, between'which j means of ascrew-s aft `23,' controlled a hand-wheel 24. Mounted free to turn and slide upon a rod 25 of the carriage 'there i's a ibs sleeve 726, connected, as indioatdlat 27, to"

support the work-holding clamp in adjstable relation to the cutter.

As above stated, the cutter may be set at the required angle to the work to produce any cut or bevel desired, and as the workholder has three adjustments relatively to the cutter the opera-tor is not called upon to exercise a great amount of skill or judgment in beveling and inishin a blade, provided it is perfectly blanked an of uniform density and even temper throughout. As these conditions are seldom found present, however, it becomes necessary to depend upon the operator to move the blade by hand when being acted upon by the cutter somewhat out ofthe direct lines of adjustment provided for in order that good results may be obtained. As ameans of facilitating this work of an operator .in manually adjusting the bladerelatively to the cutter and in order to render such adj ustment temporary only and cause the parts when free to become readjusted to the angle for which the machine was originally set l form a flexible joint 28 in the connection 27 between the Work-holding clam and the carriage on which it is mounted, t e same being preferably of a form suitable for permitting a limited universal adjustment of the worklioldin clamp.

As s own in Fig. 4, the clamp and sleeve are provided with oppositely-disposed tubular extensions 29 29 to receive a piece of rubber or other elastic material 30, which is secured therein as a connection between the same by means of pins 31 3l, extending at right angles to` each other. While rubber forms a convem'ent material. tor this purpose, l do not limit myself to its use, as a helical spring or a strip of spring metal or any other form of flexible connection may be employed as a substitute therefor.

rl`he operation is as follows: Ordinarily the blades are delivered to the machine with the edge to be beveled ground down perfectly straight, as indicated at 32 in Figs. 2 and 5, other portions thereof being finished in the rough. After a blade has been secured in the work-holder the adjustment of the frame follows to set the cutter' at a pro er angle to produce the desired bevel'. The lade is then adjusted vertically by rotat' the handwheel 24, andthe machine is relalsily for 'operation. The operator swin the Work-holder 2, with the blade clampe therein, up into a vertical position, as shown, and grasps the ends thereof7 firmly in his hands, with his thumbs pressing against the blade. Assuming the cutter to be rotating at a proper sneed, the blade is first advanced, then Withdrawn, and fed along as required to present corresponding sides ofthe several ribs 33 to the same. Thereafter the cutter is reset to bevel the opposite side of the ribs, and when this i's completed a further adjustment is necu essary for the V-shaped' portions 34 thereof.

'.lhroughout the entire k,operation the yiel movement of the Work-holder permitted by the flexible joint 28 enables the operator to shift the blade out of the direct line of adjustmcnt as required and present the same to the cutter in a manner to -insure an even cut and uniform bevel throughout and at the same time preserve the line of the cutting edge.

Having thus described my invention, l claimi. A grinding-machine, comprisin in its construction, a cutting-tool, a flexib e su port for the Work, and means for giving t e tool movement relatively to the work.

2. A grinding-machine, comprising in its construction, a rotary cutter, a iiexible support for the work, and requisite gearing for driving the cutter.

3. A grinding-machine, comprising in its construction, a rotary cutter, a iiexiblesup port for the work; adjustably mounted relatively to the cutter, and requisite gearing for driving the cutter. i

4. A grinding-machine, comprising in its construction, a rotary cutter, a work-holder, a flexible support for the work-holder permitting universal adjustment thereof, and requisite gearing for driving the cutter.

5. A grinding-machine, comprising in its construction, a rotary cutter, a carriage adjustable relatively to the cutter, a workholder, a flexible connection interposed between the carriage and work-holder as a support for the latter, and requisite gearing for driving the cutter.

6. .A grinding-machine, comprising in its construction, a rotary cutter, a flexiblymounted work-holder, means for adjusting the cutter relatively to the work, and requisite gearing for driving the cutter.

7. A grinding-machine, comprising in its construction, a rotary cutter, a work-holder, means for adjusting the cutter and workholder relatively to each other, a flexible sup port for the work-holder, and requisite driving-gearing for the cutter. l

8. A grinding-machine, comprising in its construction, aV rotary cutter, a shaft carryw ing the cutter, a frame having the shaft mounted therein, said frame being adjustable about an axis at right angles to that of the shaft, a work-holdi clamp, an adjustable carriage upon which t e clamp is mounted, a flexible connection interposed between the carriage and clam as a support for the late ter, and requisite riving-gearing for the cutter.

9. A grinding-machine comprising a rotary cutter vertically adjustable around a hori-y zontal axis, a pivotally-mounted tool-holder adjustable to and from the cutter and in a horizontal direction relative thereto, and a flexiblel connection interposed between the tool-holder and its mounting.v

10. A. grinding-machine comprising a rc IOS IIO

l tary cutter, a drivi -shat therefor, a` pivl In testimony whereof I aflix my signature otal bearing for the iving-shaft, means for in the presence of two witnesses. fixing and indicating the position of said drivingshaft, and a. lflexibly-mounted tool- 'ALFRED MAGUIN' l 5 holder situated in front of the cutter and ca.- Witnesses:

-pab1e of having its position relative to the K v GASTON QUENARDEL,

cutter altered at the will of the operator. l ABEL MAGrJIN. 

